On September 17, 2015 (August 5, 2015 in the lunar calendar), an 8.3-magnitude earthquake occurred in the waters of western Chile, which may trigger a dangerous tsunami. Local people fled in panic and gathered on the street to escape the earthquake, looking panicked. September 17, 2015 According to the U.S. Geological Survey, at around 6:54 on the 17th, Beijing time, an 8.3-magnitude earthquake occurred on the western coast of Chile, which may trigger a dangerous tsunami. The earthquake was strongly felt in the Chilean capital, and people ran to the streets to take shelter. The focal depth of the strong earthquake was 12.5 kilometers, and the epicenter was about 55 kilometers away from Irapel. The Pacific Tsunami Warning Center has issued a tsunami warning, saying a "widespread and dangerous" tsunami may occur. Previously, the Geological Survey had reported that there were two strong earthquakes in western Chile. According to the Seismic Information Network of the U.S. Seismic Survey, a 7.9-magnitude earthquake occurred at 6:54 Beijing time on the 17th, 71 kilometers northwest of Ilapel, Chile, and triggered a tsunami. The earthquake has killed at least one person. Photo source: U.S. Geological Survey. 21% of the world's earthquakes occur in Chile. Chile is bordered by the Andes Mountains to the east and the Pacific Trench to the west. Its coastline is more than 4000 kilometers. It is a country as long and narrow as pepper. Because it happens to be located on the Pacific Rim Volcanic Seismic Belt, Chile has become one of the most volcanic and seismic areas in the world: 21% of the more than 9000 earthquakes recorded annually worldwide occur here. Dr. Sergio Barrientos, director of scientific research at the Earthquake Service Center of the University of Chile, explained in 2011: According to the theory of plate movement, the western side of Chile along the Pacific Ocean is on the boundary between the Nazca Plate and the South American Plate. Under the subsidence of magma, the two plates move towards each other, collide and squeeze each other. The Nazca Plate, which belongs to the ocean plate, has a large proportion, sinks under the South American Plate and continues to squeeze into the South American Plate. Because the Nazca Plate moves quickly, earthquakes caused by its collision with the equally active South American Plate tend to be relatively strong. In addition, the subduction and subsidence of the Nazca Plate will produce strong longitudinal fluctuations under the sea, which in turn will trigger tsunamis. Paulina Gonzalez, an earthquake analysis expert at the University of San Diego, pointed out that there has been no major earthquake in the Iquique area for more than 130 years, so a lot of energy has been accumulated.